was a Japanese singer-songwriter.田家秀樹・大越正実・藤井徹貫・前田祥丈・下村誠共著『日本のベストアルバム』シンコー・ミュージック、1992年、91頁。 Career In 1969, Kawashima began singing folk songs as a student at Osaka Prefectural Hanazono High School
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf63ce434bb678a350b634f92f21c0350e1afd1a5056b218d12ebcab6569420c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f14f48c4-0ded-4b0b-bdbe-8851b9bcdda5.json and https://artists.proofprofile.net/proofs/artist/f14f48c4-0ded-4b0b-bdbe-8851b9bcdda5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18c2af73d4fd79b9e2d010f4557345a020f906b97ed5b191fbe95bdfa03a01e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR08716670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110b772f672ae38499f4ffdaa2cbd4485cb630ca9758da426f32d135f1f307d6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR08822760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671167825558caec7e5e4c06f3fec385737382da1bb8f7f512b8117de105a209. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09079429.
アコースティックベストセレクション
時代おくれ（ピアノ弾き語りバージョン）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb04f2b98356f6d91b333ebdd2d970e75c1150c6bbb59b7b999af439c308c9. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09190879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c2ae1a9de0fcb72cce38eb31b749f9d1ca657a3bb31caebe9788fdd698d941. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09367129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a961c646c813fb8dc20687c47297a379a5e44923df4c2c82e7c4667b71c9c32. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09277079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda17390ec5f3bbb66e25c56b58fc57f80b1c1c64c9eb6381f8076f5362cf3938. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09303600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402464954fd3cbc3157c2ba773b3fd5281ff3d0a71c4e56fb3faef72c6f44ac4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09502754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055e65ceba4e137c326bc9acdb123489e4d255f7740d595e2a1ce4a135d0e9aa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR08612730.
酒と泪と男と女 (ニュー・アレンジ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb5bf41ae64cc61cba8cec96856f5d9e60ed20175ec95ccd246b89b3e5707a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09169489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5047284d8801e8a40c8a10638030c00bc5941d1fd0052ada51e6d1e72609547. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09315560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc555d09de340588bbc1f42e688737964ef70c03ea05bb0ae53c22da1b8372740. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09601104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415e8b61eaf41da67b10895ebe8ecd188206354a0fbb227b8b12cda582c9f0b0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09803461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701460c3720f92e89b86af8609267c789656735388646da4e0668b6cdd1f52f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09190869.
セルフ・アンド・カバー2016〜生きてりゃいいさ〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04121530e70d4781c623df05bcd4ea0b7f92a58810784eae45db09c2965f4256. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09717131.
ＮＨＫ みんなのうた 50アニバーサリー・ベスト 〜大きな古時計〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c266357f9adaa87da2e2c7b184d38829cea325a83c60f76aed10e53d43c37. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPSR09502117.